AS
FILE NO.
SERVICE MANUAL
Remote Control Color
Television
DS31520
(U.S.A.)
ORIGINAL VERSION
Chassis No. 31520-00
NOTE: Match the Chassis No. on
the unit’s back cover with
the Chassis No. in the
Service Manual.
If the Original Version
Service Manual Chassis
No. does not match the
unit’s, additional Service
Literature is required. You
must refer to “Notices” to the
Original Service Manual
prior to servicing the unit.
Contents
Safety Instructions . . . . . . . . . . . . . . . . . . 2
Service Adjustments . . . . . . . . . . . . . . 3 - 9
Service Hints . . . . . . . . . . . . . . . . . . . . . . 10
Mechanical Disassemblies. . . . . . . . . . . 11
Chassis Electrical Parts List . . . . . . 12 - 19
Cabinet Parts List . . . . . . . . . . . . . . . . . . 20
Component and Test Point
Locations . . . . . . . . . . . . . . . . . . . 21 - 23
Schematic Insert . . . . . . . . . . . . . . . 25 - 32
Schematic Notes . . . . . . . . . . . . . . . . . 25
Pin Layouts . . . . . . . . . . . . . . . . . . . . . 25
Capacitor and Resistor Codes . . . . . . 25
Block Diagram . . . . . . . . . . . . . . . 26 - 28
Voltage Charts . . . . . . . . . . . . . . . 26 - 27
Waveforms. . . . . . . . . . . . . . . . . . . . . . 28
Schematic Diagrams . . . . . . . . . . 29 - 32
Specifications
Power Rating . . . . . . . . . . . . . . . . . . . . . 120V, 60Hz
89W (Avg), 2.5A (Max)
Antenna Input Impedance . . . . . . . . . . . . . . . . . 75
Ω
UHF/VHF/CATV
Receiving Channel . . . . . . . . . . . . . . . . 2 - 13 (VHF),
14 - 69 (UHF),
01, 14-94, 95-125 (CATV)
Remote Ready . . . . . . . . . . 37 Key Remote Control
Sound Output . . . . . . . . . . . . . . . . . . . . . . 1.0 W/CH
Intermediate Frequency
Picture IF Carrier . . . . . . . . . . . . . . . . . . 45.75MHz
Sound IF Carrier . . . . . . . . . . . . . . . . . . 41.25MHz
Color Sub Carrier . . . . . . . . . . . . . . . . . 42.17MHz
Picture Tube . . . . . . . . . . . . . . . . . . M78JUA361X72
Semiconductors
Integrated Circuits. . . . . . . . . . . . . . . . . . . . . . . 10
Transistors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Except within Tuner and RC Pre-Amp.
Cabinet Dimensions
Width . . . . . . . . . . . . . . . . . . . . . . . . . . . . 754 mm
Height . . . . . . . . . . . . . . . . . . . . . . . . . . . . 732 mm
Depth . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 538 mm
REFERENCE No.
SM
780079
DS31520, G7SAM, PRODUCT CODE 111359080
AS
MTS STEREO
